/* * parser.c * * Copyright (C) 2012 James Booth * * This file is part of Profanity. * * Profanity is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * Profanity is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Profanity. If not, see . * */ #include #include #include /* * Take a full line of input and return an array of strings representing * the arguments of a command. * If the number of arguments found is less than min, or more than max * NULL is returned. * * inp - The line of input * min - The minimum allowed number of arguments * max - The maxmimum allowed number of arguments * * Returns - An NULL terminated array of strings representing the aguments * of the command, or NULL if the validation fails. * * E.g. the following input line: * * /cmd arg1 arg2 * * Will return a pointer to the following array: * * { "arg1", "arg2", NULL } * */ gchar ** parse_args(const char * const inp, int min, int max) { if (inp == NULL) { return NULL; } // copy and strip input of leading/trailing whitepsace char *copy = strdup(inp); g_strstrip(copy); int inp_size = strlen(copy); gboolean in_token = FALSE; char *token_start = ©[0]; int token_size = 0; GSList *tokens = NULL; // add tokens to GSList int i; for (i = 0; i <= inp_size; i++) { if (!in_token) { if (copy[i] == ' ') { continue; } else { in_token = TRUE; token_start = ©[i]; token_size++; } } else { if (copy[i] == ' ' || copy[i] == '\0') { tokens = g_slist_append(tokens, g_strndup(token_start, token_size)); token_size = 0; in_token = FALSE; } else { token_size++; } } } int num = g_slist_length(tokens) - 1; // if num args not valid return NULL if ((num < min) || (num > max)) { g_slist_free_full(tokens, free); g_free(copy); return NULL; // if min allowed is 0 and 0 found, return empty char* array } else if (min == 0 && num == 0) { g_slist_free_full(tokens, free); gchar **args = malloc((num + 1) * sizeof(*args)); args[0] = NULL; g_free(copy); return args; // otherwise return args array } else { gchar **args = malloc((num + 1) * sizeof(*args)); GSList *token = tokens; token = g_slist_next(token); int arg_count = 0; while (token != NULL) { args[arg_count++] = strdup(token->data); token = g_slist_next(token); } args[arg_count] = NULL; g_slist_free_full(tokens, free); g_free(copy); return args; } } /* * Take a full line of inpu